Controllable synthesis of nickel nanowires and its application in high sensitivity, stretchable strain sensor for body motion sensing

Shan Wang, Kaifeng Chen, Min Wang, Haosheng Li, Guorui Chen, Jian Liu, Luhang Xu, Yue Jian, Chengda Meng, Xiaoyi Zheng, Suyu Liu, Chong Yin, Zongrong Wang, Piyi Du, Shaoxing Qu, Chi Wah Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

28 Citations (Scopus)

Abstract

A facile, low-cost magnetic field-assisted chemical reduction method was proposed for synthesizing nickel nanowires (NiNWs) with both controllable diameter and high length to diameter (L/D) ratio at temperature as low as 60 °C. NiNWs with diameter as low as 180 ± 21 nm and L/D ratio as high as 300 were achieved by controlling the reaction temperature, NiCl2 concentration and the quantity of reductant in a magnetic field of 170 mT. Based on the NiNWs, a high-sensitivity and stretchable strain sensor with sandwich structure consisting of NiNWs and Ecoflex elastomer was proposed. Gauge factor as high as 200 was demonstrated up to a strain of 100%. Applications of the sensor in detecting body motion including finger gestures, facial expressions and different phonations are presented. This study provides a promising solution for smart sensors for next generation robotics as well as for human-machine interfacing applications.

Original languageEnglish
Pages (from-to)4737-4745
Number of pages9
JournalJournal of Materials Chemistry C
Volume6
Issue number17
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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